Try to modify printer defaults from access-vba

Hi,
I'll try to describe my problem: I have a form. One of the fields is a hyperlink to a "pdf" file (not created by user and the user have only adobe reader and must not modify it). I want to print the file (shell and command line for adobe works) but I have a problem - must set printing zoom (smaller then 100%, but that can be changed) and also set a watermark (different for every record in table).
Can anyone help me with a command line foe adobe or ( I prefer ) a sub to change printer settings ?